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Synthetic Fibres and plastics 2

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

Read the given statements and mark the appropriate answer.

Statement 1: Fabric made from this polyester does not get wrinkled easily.

Statement 2: Polyester is a natural fibre.

a)

Both statements 1 and 2 are true and

statement 2 is the correct explanation

of statement 1.

b)

Both statements 1 and 2 are true

but statement 2 is not the correct

explanation of statement 1.

c)

Both statements 1 and 2 are false.

d)

Statement 1 is true and statement 2

is false.

2.

We should not wear synthetic clothes while cooking in the kitchen or in a laboratory.

a)

True

b)

False

3.

1. Identify the product based on the given features.

I. It is a man-made product.

II. It has a cross link arrangement of monomer units.

III. It is used for making goods like wire coverings, switch boards, laptops, etc.

a)

Lycra

b)

Rayon

c)

Thermosetting plastics

d)

Thermoplastics

4.

Mention the type of polymer.

a)

linear

b)

natural

c)

cross linked

d)

synthetic

5.

What are the 2 types of plastics:

a)

Thermoplastic and Thermosetting plastics

b)

Thermosetting plastics and PVC

c)

Thermoplastic and bakelite

d)

None of the above

6.

Which type of plastic is Bakelite

a)

Thermosetting plastic

b)

Thermoplastic

c)

None of the above

7.

What plastic is used for handles of frying pans

a)

Bakelite

b)

Polyvinyl chloride

c)

Melanie

d)

Polythene

8.

Cooking pans have plastic handles because

a)

They are light, durable and strong

b)

They are non- reactive

c)

They are poor conductors of heat and electricity

d)

They do not catch fire

9.

Polythene which is used to make polythene bags is an example of a ________.

a)

Thermoplastics

b)

thermosetting plastics

10.

Advantages of Synthetic fibres: (Select 2 option)

a)

Stronger and more durable than natural fibres

b)

They are cheaper than natural fibres

c)

They are comfortable to wear

d)

They are expensive than natural fibres

11.

In plastic the arrangement of individual units may be____

a)

Linear or cross linked

b)

Linear or straight linked

12.

______ and _____ are types of plastics

(a)  

13.

Plastics are

a)

Non biodegradable

b)

Biodegradable

14.
It is not advisable to wear clothes made of synthetic fibre while working near fire because 
a)
They are uncomfortable in those works
b)
They melt on heating and cause heavy burns
c)
They do not absorb moisture
d)
They are shiny and lustrous.
15.

1. Identify the product based on the given features.

I. It is a man-made product.

II. It has a linear arrangement of monomer units.

III. It is used for making goods like toys, combs, containers, etc.

a)

Lycra

b)

Rayon

c)

Thermosets

d)

Thermoplastics